Date Order help

[Fuzzyhaggis]

I'm teaching myself php/MYSQL by making an events list for the local are. I've got the table set up with a "datetime" type column called "daytime" and I want the php script to order the entries by the date and time (ascending). The code I'm using is...

$query="SELECT who,whoweb,day,month,date,time,DATE_FORMAT(daytime, '%W %D %M %Y, %l.%i%p') as daytimeform,venue,what FROM gigs ORDER BY 'daytime' ASC";

but's they're displayed in the order I entered them - not ordered by date. Any thoughts? I'm probably being a bit dim as I'm kinda new to this.